Annually the RCU organizes many sporting events including the Royal-Thomian, the Bradby Shield Encounter, the Royal Thomian Regatta as well as national initiatives such as EDEX and carry out development projects for the college, as well as manage and maintain much of the school's infurstutcure such as the Hostel, Royal College Sports Complex, the J.R. Jayawardene Sports Complex, RCU Skills Centre and the Swimming Pool.

[1][2] RCU is governed by the Royal College Union Council.

The council consists of honorary officers — the President and Vice-Presidents.

The ex officio post of President is held by the Principal of Royal College Colombo and Vice Presidents are distinguished Old Royalists who are appointed as patrons of the RCU.

The full membership of the RCU council is much larger, which includes trustees; past secretaries; board and committee members of ORGACO (Old Royalists Groups Associations & Clubs Organizers), EDEX, Management Boards, Clubs, RCU Trust, Age group members and appointed members.